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AZI Customer Service 800-528-7411 or 602-470-1414 Page 26 of 92
The possible displays are:
CHAMBER STABLE - The oven has been at a stable temperature for at
least the time period set.
CHAMBER STABILIZING: LOW TEMP - Oven is below temperature
setpoint.
CHAMBER STABILIZING: HIGH TEMP - Oven is above temperature
setpoint.
CHAMBER STABILIZING: xx:xx - Oven temperature is within the correct
range and the time remaining until specified time is displayed.
Ash Rate – This is used for high test temperatures that will ignite a sample.
YOU MUST USE THIS TO PREVENT HEATER DAMAGE.
The Ash Rate value is a rate of moisture loss used to limit the rate of increase
in oven temperature to slow ignition and prevent flaming. The normal
temperature setpoint is limited to keep the moisture loss at less than the set ash
rate. For example, if an ash rate of 7 %/Minute is used, the temperature
increase is controlled to maintain a ≤ 7 %/Minute moisture loss during the test.
Start Temperature Control - Prevents a test from starting if the chamber
temperature is more than two degrees hotter or colder than the IDLE
TEMPERATURE. This feature can improve the standard deviation of results
of some temperature-sensitive materials.
Ending Criteria
The criteria used by the instrument to
automatically end a test. This feature
makes it unnecessary for the operator
to monitor the analyzer while it is
performing a test. Selecting this
option will display the ending criteria
options.
Prediction - The MAX 5000XL
uses an advanced version of
the AZI moisture prediction
algorithm to automatically end
each test early to speed test
results. The prediction method
relies on the fact that most
samples exhibit a weight loss
trend such that the rate of
volatilization is proportional to
the amount of volatile material
remaining in the sample.
TO PREVENT SAMPLE IGNITION AND POSSIBLE HEATER DAMAGE,
USE ASH RATE, NOT TEMP RATE, AT ASHING TEMPERATURES. TEMP
RATE WILL NOT PREVENT SAMPLE IGNITION.